Improvement in frictional gearing



D. CHAMBERLAIN.

Frictional Gearing.

Patented March 22, 1870.

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Letters Patent No. 100,977, dated March 22,- 1870.

. IMPROVEMENT IN E'RIC'I'IONAL GEARING.

The Schedule referred to in these Letters Patent and making part of thesame.

To all to whom these presents shall come:

Be it known that I, DEXTER H. CHAMBERLAIN, of West Roxbnry, in thecounty of Norfolk and State of Massachusetts, have invented certain newand useful Improvements in Frictional Gearing, and that the following isa full and exact description of the same, reference being bad to theaccompanying plate of drawings.

The present invention relates to frictional gearing, that is, gearingwith which motion is communicated sincilply by the friction of surfacesone upon another; an

The invention consists in driving a frictional wheel or surface by thedirect action of a friction-wheel or surface arranged to bear thereon,in combination with a frictional wheel or surface arranged to bear onthe frictional wheel or surface to be driven in a plane against theaction of the driving frictional wheel or surface thereon, whereby thefrictional contact of the driving and driven wheels and surfaces isrendered the more firm, reliable, and strong, and all possibility ofslip obviated.

In the accompanying plate of drawings my improvements in frictionalgearing are illustrated Figure 1 being a side view of the arrangementand construction of frictional gearing, according to the several partsof the invention. fi Figure 2, a transverse section in plane of line atz,

Figure 3, a centrallongitudinal section in plane of line y y, fig. 2;and

Figure 4, a transverse section in plane of line 2, fig. 3.

A, in the drawings, represents a frame-work or stand, in whichfrictional gearing, constructed according to the present invention, isarranged.

B, a vertical shaft, arranged to turn in suitable bearings of the standA.

O, a wheel fastened to vertical shaft B.

This wheel is similarly 'bevcled upon its opposite faces D, and on suchfaces D, one to each face, similar frictional wheels E E are arranged tobear by their peripheries, which are of a taper corresponding therewith.

These frictional wheels E E are each attached to separate horizontalshafts F, arranged to turn within bearings of the uprights G to stand A.

The bearings in the uprights G for the lower one of the shafts F arefixed.

The bearings for the upper shaft F are constructed of blocks arranged tobe moved up and down in the posts G, said blocks being actuated and heldin position by set-screws Z, properly arranged in the frame A therefor.I

By these set-screws Z, acting through the said bearing-blocks, theshafts turning in the same can be adjusted and held in position for thefrictional wheel carried by it to more firmly bear against the wheel 0.

The bearings for the lower shaft may be arranged for adjustment as abovedescribed,and those for the upper shaft fixed in position, or they maybe both arranged for adj ustmenta To one of the shafts F, through anysuitable means, power is connected, driving it,.and thus, through itsfrictional gear and the wheel D, the vertical shaft B, to which suchwheel is attached, or other mechanism, as the case maybe.

By the arrangement of two frictional wheels E E, I

in connection with the wheel to be driven as above described, the drivenwheel is enabled to be held firm and solid against the driving-wheel,which, as is obvious, will tend to prevent slip occurring.

To produce a greater amount of contact surface in frictional gearing, Icover such surfaces with India rubber H, or any of its elastic compoundsor any equivalent material therefor, so-that in the running of the samethey can flatten at the ever-changingpoint of contact, therebycorrespondingly increasing the contact between them, and rendering theiraction upon each other more sure and certain, the elastic nature of thesaid coverings fin-cing them to their original shape after escape fromcontact.

In the present instance the rubber is shown as fastened to thefrictional wheels by pins or stems a, arranged around within the rubberin lines parallel, or nearly so, with the axis of the 'wheel or shaft,which pins project from the ends of the rubber into radial slots ornotches b of head-plates L, fastened, by keying or otherwise tothe-shaft against the ends of the rubber.

The fastening for the rubber, arranged and constructed as-abovedescribed, with pressure upon the rubber, moves in and with the same, incontradistinction to opposing or resisting it, as has hitherto been thecase in all modes of fastening for rubber on shafts, 8120., thereby, asis obvious, thoroughly counteracting the action of such pressure toloosen the rubber about its fastening totbe shaft or wheel, while at thesame time its motion in conjunction with the shaft or wheel is perfectlyinsured.

The mode of applying and securing rubber, &c., to'

shafts above described is most perfectly and fully illustrated at M inthe drawings, and as is obvious, it is susceptible of adaptation to manypurposes other than frictional gearing; as for instance, to rolls ofwringing-machines and fulling-machines, to calendarrolls, &c., where theuse of an elastic or yielding surface to rolls is desirable, and forthis mode of fastening rubber I intend, and I reserve to myself theright,

hereafter to apply for separate Letters Patent.

The frictional wheels or surfaces, in lieu of being of the formparticularly described, may be made of other and various forms, as, forinstance, concave, convex, and in parallel planes to their line ofmotion.

Having thus described my invention,

What I desire to claim, and to have secured to me by Letters Patent, is-

1. The combination, of wheels or surfaces arranged for frictionalaction,when in such combination a frictional wheel or surface is arranged foraction with regard to the driving and driven wheels or surfaces,substantially as described, for the purpose specified.

Witnesses I ALBERT W. BROWN, EDWIN W. BROWN.

